Blended cement pastes made of Portland cement and fine sand (known in Egypt as El-Karnak cement) were made using a water-cement ratio of 0.25 by weight. Three pastes containing admixture (water-soluble condensates) were also prepared using a water-cement ratio of 0.25 and condensate (superplasticize
Examination of reaction between the NSF superplasticizer and cement
✍ Scribed by R. Krstulović; A. Žmikić; P. Dabić
- Publisher
- Elsevier Science
- Year
- 1994
- Tongue
- English
- Weight
- 475 KB
- Volume
- 24
- Category
- Article
- ISSN
- 0008-8846
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✦ Synopsis
The mechanism of the reaction taking place between NSF superplasticizer and Portland cement was examined with spectrophotometric and conduetometric techniques, and strength measurements carried out in the presence of O. iZ -2% of the admixture. The results obtained for electrolyte conductivity, K, mass of admixture adsorbed to cement surface, and increase in strength, provided a basis for conclusions on the phenomena and effects occurring between the additive and the cement in the reaction medium.
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Communicated by D.M. Roy) (
Studies are reported on the interaction of sodium salt of polynaphthalene sulfonate superplasticizer (PNS) with different cement types, its effects on the flow loss, and the chemistry of the pore solution at early time of hydration from mixing to presetting. Six commercial cements displaying a wide